Valve-gear.



W. R. MGKBEN, J...

VALVE GEAR.

APPLIOATION FILED JAN.17, 1907.

Patented May 6, 1913.

3 SHEETSBEEET 1.

WITNESSES W. R. MOKEEN, JR.

VALVE GEAR.

APPLICATION FILED JAN.17,1907.

Patented May 6, 1913.

mama

INVEN 0/? S E S S M H W W. R. MoKBEN, JR.

VALVE GEAR.

APPLIUATION FILED JAN. 17, 1907, 1,061,098. Patented May 6, 1913.

3 SHEETS-SHEBT 3.

Fig; 6

A ORNEYS eam a ree ra ns.

w ILLIAM R. MCKEEN, JB-., or o AHA, NEBRASKA, ASSIGNOR, BY missus ASSIGrlfimeme, 0 McKEEN MOTOR can ccmran or OMAHA, NEBRASKA, A cannons @E'IQN OF NEW JERSEY.

nocnoe To'allwhom it may concern:

Be .it known that I, \VILLIAM R. MOKEEN, J12, residing at Omaha, in the county of "Douglas {11.1 State of Nebraska, have invented certain new and useful Improvements in Valve-Gears, of which the following is a full, clear, and exact description, such as' will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to valve gear, and, with regard to the more specific features thereof, to the valve gear of internal combustion engines.

Oneof the objects thereof is to provide simple and etficient gear of the above nature capable of ready variation of the relative times of action or other change of relation of the parts.

Another-object is to provide valve driving' mechanism characterized by compactand" durable construction and silent and eiiicient' running qualities.

Other objects will be in part obvious and in part pointed. out hereinafter.

T lf1e"i1'1vent-ion accordingly consists in the features of construction, combinations of elements and arrangement of parts which will be exemplified in theconstruction herein described and the scope of the application of which Willbe indicated in the following claims.

ln the accompanying drawings, wherein shown one of various possible embodiments of my invention, Figure l is an end elevation of an engine; Fig. 2 isa side elc vation :of the same,- Fig.3 is a detailed end viewfofa sprocket wheel and associated parts; Fig. 4 is a sectional view taken along.-

the line ar-m Fig. 3. Fig. 5 is a detailed end view of another sprocket wheel with associated parts; Fig. 6 .is a sectional view taken along the line 2 31 Fig.

Similar reference characters refer to similar parts throughout the several views of the drawings.

Astending to render clearer certain aims of this invention and the means whereby they -are achieved, it may here be noted that i'tthe action of an internal combustion engine is to be efiicient and reliable, it is of prime importance that the valves be actuated at precisely the desired points of time.

Specification of Letters Patent.

VALVE-GEAR.

brought about by slipping or wear of the It isoften desirable, nevertheless,

parts. that parts of this valve-driving mechanism be readily changeable in relation to the re mainder of the apparatus so as to perfect the synchronism of the valves with the desired points of the stroke of the engine or on account of changes in running conditions. This flexibility of control with security of adjustment are dominant features of the construction hereinafter described.

Referring now to Fig. 2 of the drawings, there are shown three cylinders of a multiple cylinder internal combustion engine, upon each cylinder 1 of which are mounted valves which, as'the same are not in themselves 0' the essence of this invention, will not be de scribed in detail. Briefly stated, the valves 2 and-3 positioned on opposite sides of each Patented May 6, i913. Application filed January 17, 1907. Serial No. 352,727.

cylinder are respectively exhaust and admission valves, for use when the engine is runn ng under the ordinary four cycle lnternal combustion principle. These valves are re spectively operated by cams 4 and 5 upon the cam shafts 6 and 7 which are longitndi nally slidable, by the hand lever 8. These shafts are disposed, as shown, upon opposite sides of the engine whereby crowding of the mechanism is avoided and other advantages are attained. in the extreme positions of these shafts the prqectmg p0Il3lQIlS -Df the cams 4 and 5 arebrought into such relationwith the co-ac ting rollers as either to cans a forward. or rearward drive of the engine and in intermediate positions these valves are permitted to remain at rest and time allow of the driving of the engine, if the same be in motion, by compressed air-.f The latter method of drive is brought about through the air valve 9 which coacts with.

projections upon cam 10 with the cam shaft- 6 in such position as to permit the valve2 toremain unaffected. This air'fvalve 9, acting in conjunction with a checigvalve 11 controlled by a suitable cam upon shatt 7, engine upon the two cycle principle tnider compressed air, all as is more fully sct forth permits the running of the cylinders oi the i about sai menace which is adjacent and driven from the crank shaft of the engine, a chain passing over both of said s rockets, and means adapted to adjust the istance between said sprockets and maintain said second'sprocket in operative relation to the crank shaft.

In apparatus of the class described, in

combination, an internal combustion engine, valve mechanism connected therewith, a shaft adapted to drive said valve mechanism, a sprocket mounted upon said shaft, a sprocket mounted adjacent and driven from the crank shaft of the engine, a chain passing over both of said sprockets, and means ad-a ted to swing said second sprocket crank shaft and adjust its distance from said first sprocket and maintain the same in operative relation to said crank shaft.

3. In apparatus of the class described, in combination, an internal combustion engine, valve mechanism connected therewith, a shaft adapted to drive said valve mechanism, a sprocket mounted upon saidshaft, a sprocket mounted adjacent and driven from the crank shaft of the engine, a chain passing over both of said sprockets, an eccentric controlling the position of said second sprocket, a gear connected with said sprocket, a gear upon said crank shaft intermeshing with said first .gear, and means adapted to swing said eccentric to vary the distance between said sprockets and maintain said gears in mesh.

4. In apparatus of the class described, in combination, an internal combustion engine, valve mechanism connected therewith, a

shaft adapted to drive said valve mechanism, a spro'cket'mounted upon said shaft, a sprocket mounted adjacent and driven from the crank shaft of the engine, a chain passing over both of said sprockets, an eccentric controlling the position of said second sprocket, a gear upon said second sprocket, a gear upon the crank shaft coacting therewith, a fixed member, and a worm and toothed sector or rack interposed between said eccentric and said fixed member adapted to swing said eccentric to vary the-distance between said sprockets and maintain said gears in mesh.

5. In apparatus of the class described, in combination, an internal combustion engine, valve mechanism connected therewith, a shaft adapted to drive said valve mechanism, a sprocket mounted upon'said shaft, a sprocket mounted adjacent and driven from the crank shaft of the engine, a chain passing over both of said sprockets, a gear connected with said second sprocket, an eccentric upon which said second sprocket and said gear are journaled, a gear upon the crank shaft of the engine co-acting with said first gear, and means adapted to swing said eccentric to vary the distance between said sprockets and maintain said ears'in mesh. 6. In apparatus of the class described, in combination, an internal combustion engine,-

valve mechanism connected therewith, a [shaft adapted to drive said valve mechanism, a sprocket mounted upon said shaft, a" sprocket mounted adjacent and driven fromthe' crank shaft of the engine,a chain passing over both of said sprockets, an internal gear connected with said second sprocket, an"ecc'entricv upon which said sprocket and said gear are journaled, a spur gear upont-he crank shaft of the engine coacting with said internal gear, and means adapted to swing said eccentric to vary the distance between said sprockets and maintain said gears in mesh. I

7 In apparatus of the class described,'in combination, an internal combustion engine, valve mechanism connected therewith, a shaft adapted to drive said valve mechanism, a sprocket mounted upon said shaft, a sprocket mounted adjacent and driven from the crank shaft of the engine, ajchain passing over both of said sprockets, an internal gear connected'with said second sprocket, an eccentric upon' which said sprocket and said gear are j ournaled, a spur gear upon the crank shaft of the engine c0- acting with said internal gear, a fixed member, and a Wornrand segment interposed between said eccentric andsaid fixed member.

adapted to swing said eccentric tovary the distance between said sprockets and maintain said gears in mesh. I g

8, In apparatus of tlie class described, in combination, an internal combustion engine, valve gear connected therewith, a cam shaft adapted to drive said valve gear, a driving member mounted upon said shaft, and means adapted to vary in either direction. from any'position the angular. disposition of said driving member to any desired degree with relation to said shaft and maintain the same in its changed disposition. v a

9. In apparatus of the class described, in combinatiom'an internal combustion engine, valve gear connected therewith, a cam shaft adapted to drive said valve gear, means adapted to drive said cam shaft from the crank shaft of the engine, and means adapted to vary the time of action of the cams of said cam shaft to any desired degree with relation to the position of the piston of the corresponding en'gine cylinder and maintains such relation constant subsequent to any change. i 1

- 10. In apparatus of the class described, in combination, an internal combustion engine, valve gear Connected therewith, a cain shaft adapted to drive said valve gear, a driving member mounted upon said shaft, and meansadapted to shift said driving-member ang-u-' .mounted upon said driving member.

12. In; apparatus of the class described, in combination, an internal combustion 'engine, valve gear connected therewith, a cam shaft adapted to drive .said valve gear, a driving member loosely mounted upon said cam shaft, a member secured to said cam shaft and provided with a worm wheel, a

.Worm meshing "with said Worm Wheel and mounted upon said driving member, and means adapted to prevent bodily movement of sand driving member and said. second member and to permit relative rotary movem'ent thereof.

13. In apparatus of the class described, in combination, an internal combustion. engine, valve gear connected therewith, a can) shaft adapted to drive said valve gear, a driving member mounted upon said shaft and slidable with relation thereto, means adapted to shift said shaft longitudinally With respect to said valve gear and said driving member, and means adapted to change the angular relation of said driving member with respect to the shaft and maintain the same in changed relation.

14. In almaratus of the class described, in combination, on internal combustion en 'gine, valve mechanism connected therewith,

a pair. of cam shafts adapted to drive said valve mechanism, sprockets eonnectedwith saideam shafts, a third sprocket driven by the crank shaft of the engine, a chain connecting said sprockets and adapted to drive said cam shafts from the crank shaft of the engine, and means adapted to vary the distance between said first sprockets and said. third sprocket and. maintain. said third. sprocket in operative relation to the crank shaft.

15. In apparatus of the class described, in combination, an. internal combustion en-- gine, valve mechz'mism conmicted thcrl-iwiih, apair of cam shafts dispos l upon opposite sides of the cylinder of said engine and adapted to drive said valve mechanism, a sprocket upon each of said cam shafts, a sprocket adjacent the crank shaft of the engine, a single chain passing over said three sprockets and adopted to drive said'cam shafts from said crank shaft, and means in combination, an internal co in combination, an internal combust roe-mos adapted to swing said last-ms sprocket about said crank sha' distance from said. first sprc maintain. the same in operative relat ,1 the crank shaft.

16. In apparatus of the Cl;

gine, valve mechanism. connecteo th. 9. pair of cam shafts disposed upon 01 sides of the cylind er of said. engine and. lit ed to drive said valve mechanism, a s upon each otsaid cam shafts, a adjacent the crank shaft of the ex single chainpassing over said three sprocltes and adapted to drive said cam shafts said. crank shaft, and eccentric cert-r. the position of said lastm.cntioned snroc a gear connected with said last-mentionet sprocket, a gear upon said c'anl: shaft i termeshing with said first and mes adapted to swing said eccentric to vary the distance between said. last sprocket and said first sprockets and maintain said gears in mesh.

17. In apparatus of the class described,

gine, valve mechanism COIl'Il'QClZ t a pair of cam shafts adapted tov sa valve mechanism, driving members mounted. upon said shafts and slidable with or. theeto, means adapted to shift said. sooth; longitudinally with respect to said "a... V0 mechanism and said driving members, a source of power, and means connecting eat: of said driving members directly with source of power.

18. In apparatus of the class described, in combination, an internal combustion c valve mechanism connected there-m pair of com shafts adapted to drive valve mechanism, sprocl'cets mounted] said cam shafts, a third sprocket driven by the. crank shaft of the engine, a chain c .1. necking said sprockets and adapted to drive said cam shafts from the crank shaft of" engine, and means adapted to shift firstunentioned sprockets angu i y with. lation to the shafts upon "which they 5 mounted and maintain the same in chi. position. 4

19. In apparatus of the class drwribed, in combination, an internal coml'iustiim enginc, valve mechanism connected then th, a pair of cum shafts adapted to drive valve mechanism, sprockets coi'incctcd W said *am sha lts, a third sprocket driven by "1 'l the crank shaft of the engine, a chain. con

nccting said sprockets and adapted to d said cam shafts from the crank shaft ot the engine, a member mounted upon e cl:- of said cam shafts adjacent said 'rl hentioned sprockets, and means comp sin worm and Wheel interposed between each 0 said. members and the l, i? i corresponding sprockets adapted to shift said sprockets angularly with relation to the shafts upon which they are mounted.

20. In apparatus of the class described, in combination, an internal combustion engine, valve mechanism connected therewith, a shaft adapted to drive said valve mechanism, a pair of sprockets one of which is mounted upon said shaft and the other of which is adjacent and driven from the crank shaft of the engine, a chain passing over both of said sprockets, means adaptedto vary the distance between said sprockets a d maintain said second sprocket in o erative relation to the crank shaft, and means adapted to-shift one of said sprockets angularly with relation to said first-mentioned shaft and maintain the same in shifted position.

21. In apparatus of the class described, in combination, an internal combustion engine, valve mechanism connected therewith, a shaft adapted to drive said valve mechanism, a sprocket mounted upon said shaft, 21 sprocket mounted adjacent and driven from the crank shaft of the engine, a chain passing over both of said sprockets, means adapted to swing said second sprocket about said crank shaft and vary its distance from said first sprocket and maintain the same in operative relation to said crank shaft, and means adapted to shift said first sprocket angularly with relation to the shaft upon which it is mounted "and maintain the same in shifted posit-ion.

22."In apparatus of the class described, in combination, an internal combustion engine, valve mechanism connected therewith,

. a shaft adapted to drive said valve mechanism, a sprocket mounted upon said shaft, a sprocket mounted ad ace'nt and driven from the crank shaft of the engine, a chaln passing over both of said sprockets, an eccentric controllingthe position of said sec ond sprocket, a gear connected with said sprocket, a gear upon said crank shaft intermeshing with said first gear, means adapted to swing said eccentric to vary the distance between said sprockets and maintain said gears in mesh, and means adapted to shift said first sprocket angularly with relation to the shaft upon which it is mounted and maintain the same in shifted position.

' shaft adapted to drive said valve mechanism, a sprocket mounted upon said shaft, a

sprocket mounted adjacent and driven from the crank shaft of the engine, a chain passing over both of said sprockets, means adapted to swing said second sprocket about said crank shaft and vary its distance from .said first sprocket and maintain the same in l 1 v t operative relation to said crank shaft, and means comprising a worm and wheel interposed between said first sprocket and the shaft upon which it is mounted, adaptedto shift said sprocket angularly with relation to said shaft and maintain-the same in shifted position.

24. In apparatus of the class described, in combination, an internal combustion engine, valve mechanism connected therewith, a shaft adapted to drive said valve mechanism, a sprd'cket mounted upon said shaft, a sprocket mounted adjacent and driven from the crank shaft of the engine, a chain pass-- ing' over both of said sprockets, an eccentric controlling. the position of said second sprocket, a gear connected' with said sprocket, a gear upon said crank shaft intermeshing with said first gear, means adapted to swing said eccentric to vary the distance between said sprockets and maintain said gears in mesh, and means'comprising a worm and wheel interposed 'betwe en said first sprocket arid the shaft upon which it is .mounted adapted to shift said sprocket anshifted position, a sprocket adjacent the crank shaft .of the engine, an eccentric controlling the position of said last-mentioned sprocket, a gear upon saidlast mentioned sprocket, a gear upon the crank shaft'coacting therewith, means adapted, to swing said eccentric to vary the distance between said last-mentioned sprocket and said firstmentioned sprockets and maintain said gears in mesh, and a chain passing over said three sprockets and adapted to drive said cam shafts from the crank shaft of the engme.

26. In apparatus of the class described, in

combination, an internal combustion engine,

valve mechanism connected therewith, a pair of cam shafts disposed-upon opposite sides of the cylinder of said engine and adapted to drive said valve mechanism, a sprocket upon each of said shafts, means interposed between each of said sprockets and the: corresponding shaft adapted to shift said sprockets angularly'with respect to the'corresponding shafts and maintain the same in shifted position, a sprocket adjacent the crank shaft of the engine, an eccentric con- 1,ee1,oss

trolling the position of said last-mentioned spr0oket,.a gear upon said last-mentioned shafts longitudinally with respect to sprocket, a gear upon the crank shaft oosprockets mounted thereon.

acting therewith, means adapted to swing In testimony whereof I affix my signature, 5 said eccentric to vary thqi distagce betigeen in the presence of two Witnesses.

said last-mentioned sproc'et an saii, :rgt- I T mentioned sprockets and maintain said WILLIAM MCKQ gine, em? means adapiecl to shiftsaid mm gears in mesh, 3, ehain passing over said Witnesses: three sprockets and adapted to dIlVB said H. P. VAN Assume,

G. W. Lemmas.

10 earn shafts from tho ci snk shaft of the en- 

